"0.227646"^^ . "0"^^ . . . . . "0.0448377"^^ . "14636988-n"^^ . . "atomic number 68"@en-us . "0.127884"^^ . . . . . "0"^^ . "114636988"^^ . "erbium"^^ . "a trivalent metallic element of the rare earth group; occurs with yttrium"@en-us . "0.0617049"^^ . . "0.121881"^^ . . "0.0983642"^^ . . . "113799188"@en-us . . "erbium"@en-us . . . . . "0.167268"^^ . "a trivalent metallic element of the rare earth group; occurs with yttrium"@en-us . . . "0.150414"^^ . "Er"@en-us . . .